Thaum cov neeg feem coob hnov 'stainless steel casting qhov chaw', lawv pom ib yam dab tsi ci, hnyav, thiab vaguely 'kev lag luam'. Qhov ntawd yog thawj qhov kev xav tsis zoo. Qhov kev muaj tiag yog nyob deb messier, ntau nuanced, thiab koom nrog ntau chemistry thiab thermodynamics raws li nws ua brute quab yuam hlau ua hauj lwm. Nws tsis yog tsuas yog nchuav hlau molten rau hauv lub qhov xuab zeb; Nws yog hais txog kev tswj ib puas qhov sib txawv los tiv thaiv ib feem ntawm kev tawg nyob rau hauv nws tus kheej thermal stress los yog corroding nyob rau hauv ib tug tshwj xeeb da dej. Qhov kawg koj pom yog 10% kawg ntawm zaj dab neeg; thawj 90% yog kev sib ntaus sib tua tawm tsam physics.
Lub Alloy tsis yog daim ntawv qhia, Nws yog qhov pib taw tes
Cov neeg siv khoom feem ntau tuaj nrog daim ntawv qhia tshwj xeeb hais tias 316L thiab xav tias yog qhov ntawd. Tab sis 316L los ntawm Mill A tuaj yeem coj txawv dua li 316L los ntawm Mill B vim muaj cov kab lus thiab cov kev coj ua yaj. Peb kawm qhov no nyuaj heev thaum ntxov nrog ib pawg ntawm cov twj tso kua mis. Lawv dhau tag nrho cov ntawv pov thawj tus qauv tab sis pib qhia micro-fissures nyob rau hauv ib puag ncig high-chloride tom qab rau lub hlis. Lub alloy yog 'yog', tab sis cov ntaub ntawv keeb kwm tsis zoo rau daim ntawv thov. Tam sim no, peb siv sijhawm ntau los tham txog qhov chaw ua haujlwm - pH, qhov kub thiab txias, cov xov xwm abrasive - raws li peb ua qhov ntsuas qhov ntev. Cov stainless hlau casting qhov chaw rau cov khoom siv hauv hiav txwv thiab cov khoom noj khoom haus tuaj yeem yog 316L, tab sis lawv cov kev xav tau microstructural yog ntiaj teb sib nrug.
Qhov no yog qhov uas kev sib koom ua lag luam mus sij hawm ntev tseem ceeb. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog lawv peb lub xyoo caum hauv casting thiab machining, tej zaum yuav muaj ib tug sib sib zog nqus, tswv tsev qiv ntawv ntawm yuav ua li cas sib txawv heats ntawm stainless ua nyob rau hauv lawv lub plhaub thiab peev molding txheej txheem. Lub koom haum nco ntawd yog ib yam dab tsi uas koj tsis tuaj yeem rub tawm los ntawm cov ntaub ntawv. Lawv hais txog kev ua haujlwm nrog cov alloys tshwj xeeb xws li cov nickel-based, uas qhia kuv tias lawv tau siv los cuam tshuam nrog tus cwj pwm finicky solidification ntawm cov hlau ua haujlwm siab-stainless tsuas yog qhov chaw nkag.
Lub ncuav nws tus kheej yog lub qhov rais tseem ceeb. Koj tab tom saib rau qhov ntws, txoj kev hlau ua rau pwm - turbulent thiab koj tau txais oxide inclusions; qeeb heev thiab koj tau txias kaw. Rau complex stainless hlau casting qhov chaw nrog cov ntu nyias, peb feem ntau siv lub tshuab nqus tsev-pab casting lossis qaij pouring los tswj qhov sau. Nws tsis yog tus qauv coj ua rau txhua txoj haujlwm, tab sis nws yog ib qho cuab yeej uas koj xav tau thaum lub geometry xav tau nws. Lub hom phiaj yog tuab, homogeneous qauv ntawm qhov pib, vim tias koj tsis tuaj yeem tshuab tawm porosity.
Geometry Dictates tus txheej txheem (tsis yog lwm txoj kev ncig)
Qhov no yog ib txoj cai tseem ceeb. Koj tsis xaiv ntawm plhaub molding thiab peev casting vim ib qho yog 'zoo dua'. Koj xaiv vim ib feem qhia rau koj. Kuv nco qab txog cov turbine hniav tivthaiv nrog cov cua txias sab hauv uas tsis tuaj yeem ua tshuab. Tib txoj kev yog peev casting-tsim ib tug ceramic core nyob ib ncig ntawm cov hlau yog poured. Qhov kev tshem tawm tseem ceeb tom qab ntawd yog nws tus kheej ua haujlwm me me. Plhaub molding, ntawm qhov tod tes, yog zoo heev rau nruab nrab-complexity, loj-ntim qhov chaw xws li lub cev valve lossis cov yeeb nkab fittings. Qhov saum npoo tiav yog qhov zoo, qhov ntev ntev yog qhov tsim nyog, thiab nws yog kev lag luam ntau dua rau qee qhov ntau thiab tsawg.
QSY cov npe ntawm ob lub plhaub pwm thiab peev casting raws li kev tshwj xeeb tau qhia. Nws txhais tau tias lawv (los yog lawv cov engineers) muaj kev nkag siab los ua qhov project los ntawm cov txheej txheem tsim nyog. Kuv tau pom cov khw sim yuam lub square peg rau hauv lub qhov puag ncig, siv peev casting rau ib qho yooj yim flange vim nws yog dab tsi lawv muaj, tshuab nyiaj txiag. Lub chaw tsim khoom ntse ntsuas qhov ntu, nws qhov yuav tsum tau ua siab ntev, nto tiav (Ra tus nqi), thiab kom muaj nuj nqis, tom qab ntawd pom zoo rau txoj hauv kev. Qee lub sij hawm, rau ib qho nyuaj heev, nws yog ib qho hybrid-kev nqis peev cam khwb cia nyob ze-net-zoo, tom qab ntawd siv lawv lub peev xwm CNC machining los ntaus qhov kawg qhov tseem ceeb thiab cov xov.
Hais txog machining, qhov ntawd yog lwm ib nrab ntawm qhov tseeb. Ib qho cam khwb cia tsis tshua npaj xa nkoj. Gating cov ntsiab lus yuav tsum tau muab tshem tawm, nto machined rau mates nrog lwm yam khoom, qhov drilled thiab tapped. Kev sib koom ua ke ntawm casting thiab CNC nyob rau hauv ib lub ru tsev, raws li QSY muaj, yog qhov zoo heev. Nws ua kom cov machinists nkag siab txog qhov ua tau zoo ntawm qhov tsis zoo-xws li qhov uas cov porosity shrinkage yuav lurk-thiab tuaj yeem npaj lawv cov kev txiav. Nws zam qhov kev ua si liam ntawm qhov chaw tsim khoom thiab lub khw muag khoom thaum lub cuab yeej me ntsis tsoo qhov khoob khoob.
Tus nqi zais: Tsis muaj kev sim ua kom puas tsuaj thiab rov ua haujlwm dua
Kev siv nyiaj rau qhov project casting feem ntau overlooks lub sijhawm tshuaj xyuas thiab rov ua haujlwm dua. Qhov no yog qhov tseeb qhov zoo yog pov thawj. Dye penetrant testing (PT) rau cov kab nrib pleb, kuaj hluav taws xob (RT) rau cov voids sab hauv, kev ntsuas siab rau cov khoom sib khi-txhua ntxiv nqi thiab sijhawm. Tab sis hla nws yog kev twv txiaj. Peb tau tsim ib txoj cai: rau ib qho twg stainless hlau casting qhov chaw nyob rau hauv daim ntawv thov kev nyab xeeb-tseem ceeb lossis kev pabcuam hnyav, RT tsis tuaj yeem sib tham, txawm tias tus neeg siv khoom tshwj xeeb tsis qhia meej rau nws. Nws tau cawm peb ntawm ntau qhov kev ua tsis tiav.
Rework yog lwm qhov tseeb. Ib qho tsis sib haum me ntsis ntawm cov pwm, kev hloov me me thaum lub sij hawm khov kho, thiab koj yuav muaj flange uas yog 0.5 hli tawm ntawm spec. Nws puas tuaj yeem tau txais kev cawmdim los ntawm kev vuam thiab rov ua dua? Qee lub sij hawm, yog tias koj muaj welder tau ntawv pov thawj rau cov qib stainless hlau thiab ua raws li cov txheej txheem kev kho cua sov tom qab nruj kom rov ua kom muaj kev tiv thaiv corrosion. Lwm lub sij hawm, nws yog seem. Tus nqi tawm los yog qhov ntsuas tseem ceeb rau txhua qhov chaw tsim khoom. Ib tug siab yield qhia tau zoo cov txheej txheem. Thaum ntsuam xyuas tus neeg muag khoom, nug txog lawv cov txiaj ntsig zoo ib yam rau qhov zoo sib xws yog qhia ntau dua li tsuas yog nug tus nqi xwb.
Qhov tshwj xeeb Alloys nyob ib sab
Ua haujlwm nrog tus qauv 304 lossis 316 stainless yuav luag qhia koj rau kev dhia mus rau superalloys QSY hais txog, zoo li npib tsib xee lossis cobalt-based. Cov hlau no yog exponentially nyuaj dua. Lawv nkig thaum molten, nquag kub tearing, thiab ua phem rau cov cuab yeej thaum lub sij hawm machining. Cov hauv paus ntsiab lus ntawm kev tswj kev ruaj khov thiab kev tswj xyuas thermal uas koj kawm los ntawm stainless tsuas yog amplified. Yog tias lub chaw tsim khoom muaj peev xwm tswj tau cov no, nws qhia tias lawv cov txheej txheem tswj kev tsis tu ncua yog qhov nruj heev. Nws yog lub npe zoo rau kev muaj peev xwm.
Piv txwv li, lub rooj vag thiab nce qhov system - cov kab uas pub cov hlau molten rau hauv cov kab noj hniav - rau cov nickel alloy casting yog ib qho haujlwm ntawm thermal simulation art. Koj tsis yog sau ib daim duab xwb; koj tab tom coj cov cua sov kom ntseeg tau tias cov ntu tuab tshaj plaws ua kom ruaj khov kawg kom tsis txhob shrinkage kab noj hniav. Tib qhov kev npaj ua tib zoo, tsuas yog nrog cov ceg txheem ntseeg siab dua, siv rau kev thov cov ntawv thov tsis muaj zog. Nws yog txhua yam hais txog kev tswj kom sov.
Kev xav zaum kawg: Nws yog kev sib koom tes, tsis yog kev yuav khoom
Kev txiav txim stainless hlau casting qhov chaw tsis zoo li kev yuav khoom tawm ntawm lub txee. Nws yog kev sib koom tes. Cov haujlwm ua tau zoo tshaj plaws tshwm sim thaum tus neeg siv khoom sib qhia tag nrho cov ntsiab lus ntawm qhov kev siv, thiab cov chaw tsim khoom muab cov lus qhia txog kev tsim qauv rau kev tsim khoom-qhia cov duab me me, pom zoo cov phab ntsa thicknesses, qhia txog qhov chaw muab cov kab sib faib. Ib qhov kev paub dhau los, zoo li 30 xyoo hais los ntawm QSY, yog qhov tseem ceeb ntawm cov ntaub ntawv loj ntawm qhov ua haujlwm thiab qhov tsis muaj nyob hauv lub ntiaj teb tiag.
Cov khoom kawg yuav tsum tsis pom. Nws yuav tsum tsis txhob poob, nws yuav tsum tsis txhob corrode ntxov ntxov, nws yuav tsum cia li ua. Qhov kev ntseeg tau yog qhov tseeb tus nqi ntawm qhov zoo-ua casting, deb tshaj tus nqi ntawm ib kilogram ntawm stainless hlau. Nws yog qhov tshwm sim ntawm ib txhiab me me, raug txiav txim siab los ntawm yaj mus rau cov khoom xa tuaj, feem ntau ntawm cov neeg siv kawg yuav tsis pom - thiab qhov ntawd yog qhov nws yuav tsum ua.
